Truong-Sinh Leduc, M.D.
Internal Medicine Physician · Fountain Valley, CA
Truong-Sinh Leduc, M.D. is an internal medicine physician with a practice address in Fountain Valley, California, and NPI 1457430886, issued on Nov 5, 2006. Check the license (California G56656, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Truong-Sinh Leduc
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- G56656 CA
FT562A CA
FT574Z CA
Self-reported in NPPES; status is on the state search - Practice location
- 11160 Warner Ave, Fountain Valley, CA 92708
- Phone
- (714) 540-0105
- Enumerated
- Nov 5, 2006
- Record last updated
- Mar 14, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (714) 540-6727
- Medicaid ID
- 00G566560 CA
- Medicare enrollment
- Enrolled (PECOS I20090622000304); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 11160 Warner Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Truong-Sinh Leduc in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G56656Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,093 Medicare Part D claims for 422 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Vemlidy714 claims
- Famotidine290 claims
- Baclofen162 claims
- Entecavir150 claims
- Tenofovir Disoproxil Fumarate89 claims
- Omeprazole75 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $24,578.60
30 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Truong-Sinh Leduc among 17,696 internal medicine physician records in California
Truong-Sinh Leduc, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1983 · median 2004 among the 11,065 with a school on file
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
83 internal medicine physician records list a practice address in Fountain Valley
They are 83 of the 2,190 NPPES records with a practice address in Fountain Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Fountain Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joel Bartlett, MDFountain Valley, CA 927081073518791
- Ihong Chen, MDFountain Valley, CA 927081104822535
- Naomi Cheung, MDFountain Valley, CA 927081073503314
- Alan Dang, M.D.Fountain Valley, CA 927081043217359
- Alton ForanFountain Valley, CA 927081619968799
- George Hong, MDFountain Valley, CA 927081154328532
- Brandon Khaw, MDFountain Valley, CA 927081568453637
- Lalita Komanapalli, MDFountain Valley, CA 927081578560884
Common questions
What is Truong-Sinh Leduc, M.D.'s NPI number?
Truong-Sinh Leduc, M.D.'s National Provider Identifier (NPI) is 1457430886, issued on Nov 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Truong-Sinh Leduc, M.D. located?
The NPPES record lists a practice address at 11160 Warner Ave, Fountain Valley, CA, 92708. Phone: (714) 540-0105. Providers update this record themselves, so call before visiting.
How can I verify Truong-Sinh Leduc, M.D.'s license?
NPPES lists California license number G56656, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Truong-Sinh Leduc, M.D. prescribe under Medicare Part D?
In 2024, Truong-Sinh Leduc, M.D. had 2,093 Medicare Part D claims for 422 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.